There are a lot of different glasses (all different shapes and sizes) to choose from. I have tried most of them, but only go with one type..
1) Oversized- By putting 6 oz of wine in a 12 to 16 oz glass (or even larger), you allow a lot of room to "swirl" or airate the wine... and
2) The widest diameter "bulb" with the smallest possible opening.. I find that this will help to trap any of the aromas that the swirling releases. It is really uncanny just how this type of glass will seem to magnify the smell of the wine.